CVE-2021-46463

CRITICALNVD 9.89.8—
EchelonGraph scoreMEDIUM confidence

Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2022-02-15. NVD baseline CVSS 9.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Trending — 3 sources updated this week
9.8
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 2%CVSS: 9.8Exploit: NoneExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

njs through 0.7.1, used in NGINX, was discovered to contain a control flow hijack caused by a Type Confusion vulnerability in njs_promise_perform_then().

CVSS v3
9.8
EG Score
9.8(medium)
EG Risk
49(Track)
EG Risk 49/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity98% × 45%
Exploitation2% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS
74.2%
KEV
Not listed

Published

February 14, 2022

Last Modified

November 21, 2024

Advisory Details (3)

Auto-updated Jul 13, 2026
Patch available. Sources: github_commit.
generic

NetApp Product Security

https://security.netapp.com/advisory/ntap-20220303-0007/
generic

Control flow hijack caused by Type Confusion of Promise object · Issue #447 · nginx/njs · GitHub

https://github.com/nginx/njs/issues/447
github_commit Patch Available

commit 6a40a85ff239 (nginx/njs)

Patch available: nginx/njs 0.9.0 (contains commit 6a40a85ff239)

https://github.com/nginx/njs/commit/6a40a85ff239497c6458c7dbef18f6a2736fe992

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 13× in last 7d / 48× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-07-23 02:06 UTCEG score recompute
  2. 2026-07-22 22:52 UTCEG score recompute
  3. 2026-07-22 14:06 UTCEPSS rescore
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  74. 2026-05-26 03:03 UTCEG score recompute
  75. 2026-05-26 03:03 UTCGHSA enrichment

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Frequently asked(5)

What is CVE-2021-46463?
CVE-2021-46463 is a critical vulnerability published on February 14, 2022. njs through 0.7.1, used in NGINX, was discovered to contain a control flow hijack caused by a Type Confusion vulnerability in njspromiseperform_then().
When was CVE-2021-46463 disclosed?
CVE-2021-46463 was first published in the National Vulnerability Database on February 14, 2022, with the most recent update on November 21, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2021-46463 actively exploited?
CVE-2021-46463 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 74.2% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2021-46463?
CVE-2021-46463 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2021-46463?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2021-46463, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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